Furnace



Sept. 28 1926.

C. W. HAMILTON FURNAC E Filed Jan. 25

Carl Wfiamziltoza Patented Sept. 28, 1926.

STATES 1,601,622 'PQAT'ENT "OFFICE.

' oannw. nA virL'ro v," or NEWTON, KANSAS.

- summon.

hpplication filcd January 2a, 1926. Serial No; 83,396.

This invention relates furna es and especially to improvementsin tothose of the, oil

burning type or design such as used in conjunction with locomotiv iiigapparatus,

object to provide an advantageous the supply of air to means forpreheating the combustion chamber of a furnace,

es and correspondthe invention having for an form of whereby to perfectcombustion with the practicing of a material economy in fuelconsumption, as well as materially increasing the heating efficiency ofan equipped furnace and avoiding any possibility of breakage orpremature deterioration of parts housed therewithin or adjacentto andcommunicating with the combustion son of the direction of air thereonto.

It is also an equally chamber or by reachilling drafts of important object of the invention to provide a-device of the character mentionedwherein,

without the usage of an auxiliary heating means, that air supplied tothe combustion chamber of the furnace will be preheated, such preheatingbeing accomplised by the utilization of energy'otherwise wasted from thefurnace.-

Other objects of the invention will be in part obvious and in parinafter.

In orc er of operation may that the invention be readily understood bypersons skilled in the art to which it appert pointed out hereand itsmode tains I have in the accoinpanyingillustrative drawings, and in thedetailed following description based thereupon,

set out one possible embodiment of the same.

In these drawings Figure 1 is gitudinal section fragmentary verticallonthrough a furnace constructed in accordance with the invention,

Figure 2 is a vation of the same, broken away and Figure 3 is a 1 takenon tne line 33 0 in the direction in which and on the front andfragmentary elea portion of which is shown in section,

vertical transverse sect on f Figure 1, looking Figure 4: is acorresponding'section ta-ken line 1% of Figure 1, look1ng1n the 1direction in which the arrows point.

Having more particular reference to the drawings,

in connection with which like characters of reference Wlll designatecome-- sponding parts throughout, 1 indicates the housing or casingprope furnace, such for xainp r of :an oil burning le as those ,typesgofthe arrows point,

on burning furnaces commonly used upon a now prevalent form oflocomotives a fire pan 2 being arranged and supportedbeneath the same inthe manner shown in the Figure 1 and having an intermediatcly a rangedlongitudinally disposed pocketforined therein and extended throughoutits length; the rearward portion of said fire pan opening at'one end ofthe furnace constructionwhile' the forward port-ion thereof is also openflush w th the adjacent end of the furnace housing but is adapted tocommunicate with the: closure housing 3 of an airre'gister -gen orallydesignated by the=numeral 1 adapted to control the intake or inflow ofair thereby.

into the combustion chamber of the furnace; a burner pipe .or nozzlebeing extended through the central portion o f'said register into thecombustion chamber of the furnace as illustrated in the Figure 1.

.A plurality of relatively spaced longitudinally' disposed supportingwalls 5 are received upon the fire pan 2 of the furnace and-areremovably arranged with respect the rearward end thereof is arrangeddirectlyadjacent to and vin contact with the ad jacent rearward portionof the furnace housing 1, while the intermediate portion of said wall islongitudinally curved downwardly upon itself and extends to a'pointadjacent to the forward end of the fire pan 2 and likewise, the forwardend of the housing 1. Likewise," the transverse curvature of the wallincreases in its depth as it nears the forward end'thereof, so thatineffect, said Wallis provided-with an'intermediate longitudinallydisposed pocket decreasing in depth towards its rearward end into andthroughout which combustion is efiected. This lower and forward end ofthe refractory wall 6, however, is arranged in proximity to the adjacentportion ofsthe fire pan. 2, that is, it is so curved downwardly upon;itself as to materially restrict the area of the ,opening fat therearward end thereof and by consequence, it will be understood that airflowing into the rearward and open end of the fire pan at atmosphericalpres sure will, in passing through this restricted area between theforward ends of the fire wall 6 and the fire pan 3, have its velocityincreased and hence, that the same will be so discharged into the casingS for delivery into the combustion chamber 7 of the furnace constructionin a manner to thoroughly admix the fuel charge.

Because of the fact that the transverse and longitudinal curvature ofthe refractory wall 6 is such as to present an impedance to the passageof air through the various ways beneath the wall 6 from the rearward endthereof to its forward end, it will be seen that such air in contactingwith the refractory material of such walls will be preheated and in thispreheated form will be discharged into the end casing 3 for deliveryinto the combustion chamber 7 by way of the air registert; it of coursebeing understood that this preheating of the air in the way below thewall 6 does not occur until said wall 6 has been heated from the flameproduced at the discharge end of the burner, aforesaid. Consequentlyupon this preheating of air prior to its delivery into the combustionchamber 7 of the furnace construction 1, it will be understood thatcombustion within such chamber will be prefe-cted and likewise, thatopeation of the furnace may be carried on nith a material economy infuel consumption together with a material increase of the heatingefficiency of an equipped furnace. Also, due tothe preheat ing of airbefore its discharge into the combustion chamber of an equipped furnace,it will be readily appreciated by workers skilled in the art that thedelivery of chilling blasts of air onto those parts housed within oradjacent to and communicating with the combustion chamber will beprevented and therefore, that damaging of the same as by crystallizationor by other detrimental processes will be eliminated, also, that carbonformations and deposits within the furnace construction will be avoided,since a perfect combustion of fuel is effected within the chamber 7.

In this connection, it will be noted upon reference to the Figures 2 tot inclusive that the fire pan 2 by being formed with a transverselycurved and longitudinally disposed intermediate pocket, is permitted tobe conveniently installed upon a furnace of the locomotive type andfurther, that because of the transverse curvature of this pocket, whichgenerally conforms to the transverse curvature of the fire wall 6, anair way or passage as between said pan and said fire wall is effected sothat air passing thereinto from the open rearward end of the pan will bepositively caused to have contact wall 6.

It is also of importance to note that by reason of the forming of thelongitudinally disposed intermediate and transversely curved pocket inthe fire wall 6, the air preheating surface of said fire wall, that is,that surface of the same exposed to the way between the same and thefire pan 2 will be materially increased and thus, will give greater heatradiating efficiency to the equipped furnace construction, efiecting apositive preheating of air taken into the passage or way beneath thefire wall 6 and above the fire pan 2 and discharging the same at a hightemperature into the casing 3 at a point beyond said fire wall 6whereupon the air so preheated is adapted to be delivered in a suitablyregulated supply from the register 4 into the combustion chamber 7.Furthermore, attention is invited to the fact that by extending the firewall 6 throughout the entire length of the furnace housing 1 and thefire pan 2, the air passing through the way or passage aforesaid will beafforded an even greater heating area or surface than were the fire wall6 formed with a discharge port or way in the forward end thereofinwardly of the housing 1 and directly above the the pan 2; it beingborne in mind herein that through the instrumentalities of my invention,I

cause the air in process of preheating to 3 pass over a heating surfaceextending for the full length of the furnace housing 1 and the fire pan2, whereupon such preheated air is discharged at a point adjacent andflush with the forward end of the furnace housing 1 and fire pan 2 intothe air register casing 3 secured, in a suit-able manner, to the forwardend of the furnace construction. Also, by eliminating the discharge ofpreheated air upwardly through a discharge port or way formed in thefire wall into the combustion chamber and instead, discharging thepreheated air directly and in a longitudinal direction into the forwardend of the combustion chamber 7, it will be appreciated that thevelocity of the preheated air will in no way be diminished, exceptthrough regulation by the vanes of the air registers 4E, and thus, thata perfect admixture of the same with the fuel discharged from the burnerinto the combustion chamber will be efiected.

Manifestly, the construction shown is capable of considerablemodification, and such modification as is within the scope of my claims,I consider within the spirit of .my invention.

I claim 1. In a furnace of the character described, a lire wall having alongitudinally disposed pocket formed therein throughout the greaterportion of its length, the upper side of said pocket forming acombustion cham her and the lower side thereof forming an air heatingway open at either end and decreasing in area towards its forward end.

2. In a furnace of the character described, a fire wall having anintermediately arranged longitudinally dis-posed pocket formed thereinthroughout the greater portion of its length, the u per side of saidpocket forming a combustion chamber and the lower side thereof formingan air heating way open at either end and decreasing in area towards itsforward end.

3. In a furnace of the character describes, a fire wall having alongitudinally disposed pocket formed therein, said pocket increasing indepth toward and to the forward end of said wall, the upper side ofsaidpocket forming a combustion chamber and the lower side thereof formingan air heating way open at either end and decreasing in area towards itsforward end.

l. In a furnace of the character described, afire wall having alongitudinally disposed pocket formed therein throughout the greaterportion of its length, said pocket starting inwardly and extendingdownwardly .at a point slightly beyond the rearward end of the wall andincreasing in depth toward and to the forward end of said wall, theupper side of said pocket forming a combustion chamber and the lowerside thereof forming an air heating way open at either end anddecreasing in area towards its forward end.

5. In a furnace of the character described, a fire wall having anintermediately arranged longitudinally disposed and transversely curvedpocket formed therein throughout the greater portion of its length, saidpocket starting at .a point inwardly or the rearward end of said walland increasing in depth throughout toward and to the forward end of suchwall, the upper side of said pocket forming a combustion chamber and thelower side thereof forming an air heating way open at either end anddecreasing in area towards its forward end.

6. In a furnace of the character described, a wall of refractorymaterial supported between the lower portion of the furnace housing andthe fire pan thereof, said wall being curved transversely upon itselfthroughout its length and the rearward end thereof being disposedupwardly whereby to materially increase the space beneath the same andthe adjacent portion of the fire pan while the forward end of said wallis arranged to materially reduce such space adjacent the forward end ofsuch fire pan, said forward portionof the space beneath the wallcommunieating with the combustion chamber of the furnace.

7. In a furnace of the character described, a fire pan having anintermediate longitudinally disposed pocket formed throughout itslength, the forward and rearward ends of such pan being open, a firewall above said pan having a longitudinally disposed pocket formedtherein throughout the greater portion of its length, the upper side ofsaid pocket forming a combustion chamber and the lower side thereofforming an air heating way open at either end and decreasing in areatowards its forward end, and means adjacent the forward end of said panand said wall for'receiving air passing from between the pan and walland discharnin the same into said combustion is chamber.

8. In a furnace of the character described,

a fire pan having a longitudinally disposed pocket formed thereinthroughout its length, the forward and rearward ends of said pan beingopen, a fire wall arranged above said pan, said fire wall having anintermediately arranged longitudinally disposed pocket formed therein,said pocket starting at a point inwardly of the rearward end of the firewall and increasing in depth toward and to the forward end or such firewall, the upper side of said pocket f0 'ming a combustion chamber andthe lower side thereof forming an air heating way open at either end anddecreasing in area towards its forward end, and means for receiving airpassing from between said pan and wall and discharging the same intosaid combustion chamber.

9. In a furnace of the character described,

a fire pan having an intermediately arranged longitudinally disposedtransversely curved pocket formed therein throughout its length, theforward and rearward ends of said pan being open, a fire wall supportedabove said pan, said fire wall having an intermediately disposedlongitudinally extending transversely curved pocket formed thereinthroughout the greater portion of its length. the pocket starting at apoint inwardly of the rearward end of the fire wall and increasing indepth toward and to the forward end of the fire wall, the upper side ofsaid pocket forming a combustion chamber and the lower side thereofforming an air heating way open at either end and decreasing in areatowards its forward end, and means adj acent the forward end of said'panand wall for receiving air passing therebetween and returning the sameinto said combustion chamber.

10. In a furnace of the character described, a fire wall extendingentirely throughout the length of the lower portion of the furnacehousing, said wall having a longitudinally disposed pocket formedtherein for a portion of its length, the upper side of said pocketforming a combustion chamber and the lower side thereof forming an airheating way open at either end and decreas ing in area towards itsforward end, a pan supported below and spaced from said wall having openforward and rearward ends, and means communicating with the forward endof said pan and said wall for receiving air passing between such pan andwall and discharging the same into said combusitnon chamber.

11. In a furnace of the character described, a fire wall having anintermediately arranged longitudinally disposed transversely curvedpocket formed therein for a portion of its length, said pocket startingat a point inwardly of the rearward end of the wall and increasing indepth throughout its length toward and to the forward end of said wall,the upper side of said pocket forming a combustion chamber and the lowerside thereof forming an air heating way open at either end anddecreasing in area towards its forward end, said fire wall extendingthroughout the entire length of the furnace housing, a fire pan arrangedbeneath said fire wall and extended throughout the entire length of thesame, the opposite ends of said pan being open, and means communicatingwith the space between the forward ends of said pan and said wall forreceiving air passing therefrom and directing the same into saidcombustion chamber.

In witness whereof I have hereunto set my hand.

CARL W. HAMILT N.

